internal duplicate content, might not hurt (might hurt), definitely does not help.

force lowercase, always. 1 page == 1 URL, 1 URL == 1 page

always set a canonical, the canonical is content dependent, not URL dependent.

also, your tag pages are wasted, as you do not target a sensemaking phrase i.e.: "Posts tagged with lawschool" nobody searches for that.

also there is no sitemap.xml reference in the robots.txt, which is at least a warning signal.

also i got a very concerning result while doing a webpagespeed test http://www.webpagetest.org/result/140519_H1_10TE/1/screen_sh... i only got the first result of a tag page

i could see this with a first request no cookie (on firefox), too, this is very strange, and if this is communicated to google this will definitely lead to traffic loss. have you done an extensiv "fetch with googlebot" using webmaster tools?

my name is franz enzenhofer, i'm the most successful SEO in europe, write me a twitter message, so like now. hope you read this.

in just 5 minutes i have seen 3 warning signs, if this is all new to you, please just fire your SEO instead of your moderator staff!